Ammonium magnesium sulfate


Ammonium magnesium sulfate is a chemical compound with the chemical formula. It forms hydrates.

Synthesis

The compound is prepared by reduction of ammonium persulfate with magnesium metal.

Physical properties

Ammonium magnesium sulfate forms crystals, soluble in water.
The compound forms a crystallohydrate containing —colorless crystals of monoclinic system, space group P21/c, coordinate parameters a = 0.928 nm, b = 1.257 nm, c = 0.620 nm, β = 107.1°, Z = 4.

Natural occurrence

Ammonium magnesium sulfate hexahydrate naturally occurs as Boussingaultite, a rare mineral of picromerite group, originally described from geothermal fields in Tuscany, Italy, where it occurs together with its iron analogue mohrite.